Excavator.



L. A. DSY.

BXCAVATOR. y APPLIGATION FILED JUNE 3,1908. RENBWBD JULY 9,1909.

Patented Feb. 15, 1910.

5 SHEETSwSHEBT 1.

, @.IlYdulumellcW. HILIHIWIN@ Louis rsene elgy :HIIHIL Witnesses:

Inventor,

Attorney L. A. DESY.

BXCAVATOR.

APPLICATION FILED JUNI: s, 190s. Rmmwm JULY 9, 1909.

949,354. Patented 116111.11910.

5 SHEETS-SHEET 2.

Attorneys L. A. DESY.

BXCAVATOR.

APPLIGATION FILED JUNE a, 190e. RENBWED JULY 9,1909.

Patented Feb. 15, 1910.

SHEETS-SHEET 3.

Attorneys.

L. A. DESY.

EXCAVATOR.

APPLICATION FILED JUNE a, 1908. -EENBWED JULY 9,1909.

949,354.. Patented Feb.15,1910.

5 SHEETS-SHEET 4.

Attorneys L. A. DESY.

EXCAVATOR.

APPLICATION FILED JUNI: s. 1908. BBNLWBD JULY 9, 1909.

Patented Feb. 15, 1910.

5 SHEETS-SHEET 5.

i Loads By. W

rse/ze y entor,

Inv

Witnesses:

Attorneys UNITED STATES PATENT oEEIGE.

LoUIs ARSENE DESY, or MONTREAL, QUEBEC, CANADA.

ExcAvA'roB.

Specification of Letters Patent.

application mea :une 3,1908, serial No. 436,477. Renewed July e, 1909.serial No. 506,830.

To all whom it may concern:

Be it known that I, LOUIS ARSENE DsY, a subject of the King of GreatBritain, residing in the city and district of Montreal, Province ofQuebec, Canada, have invented certain new and 'useful Improvements inExcavators; and I do hereby declare that the following is a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains rto make and use the same.

The invention to be hereinafter described relates to steam shovels andsimilar excavating machines, and particularl to a combined means fortransporting t e machine and steadying or balancin 1t while in oeration. Machines of this 'nd are excee ingly heavy, very large, andconsequently, as now constructed, unwieldly. Due to their size they'require a very broad supporting base. 'Ihelr great weight renders itimossibleto .mount them on traction wheels anse the wheels would beforced so deeply into the road surface Aas to render them not onlyuseless but objectionable as obstruc- `tions. Likewise their bulkandgsize, necessitating a broad support, render it impossible to mountthem on railway tracks with out the use of jack screws or other sidebraces to keep the machines from becoming overbalanced during operation,as the derrick and shovel beam are worked on one side or the other.Consequently, as a choice of the lesser of two evils, the machines havebeen duniformly constructed with narrow supporting bases which may bemounted on railway tracks. and so moved from pointA to point along theroad, jack-screws or other side braces beiner brought into use when themachine was to be operated, in order to prevent the machine beingoverturned or forced from the track.

ItI is to overcome this serious objection and to provide a machine whichmay travel by its own tractive power,- wherever desired and over anyordinary road bed, that the present invention has been desi ned.

In order to enable one skille to which the present invention relates, tothe more readily understand the construction, operation and use of thesame, reference should be had to the accompanyin drawings forming art ofthe present ap ication. Throughout t e several views of tie drawin theartings like reference characters designate the same parts.

In the drawings: Figure 1 is a side elevation of the machme with theshovel and derrick omitted; Fig. 2 is a front view of the same, showing1n dotted lines a railway track and wheels',`as the machines are atpresentsupported; Fig. 3 is a rear view, showing the steering mechanism;Fig. 4 is a side elevation of'oneof the traction devices, detached; Fig.5 is a plan view of Fig. 4 Fig. 6 is a vertlcal section on line'--G ofFig. 5; Fi .'7 is ahorizontal section on line 7-7 of Iig. 4; Fig. 8 is abottom lan view of one vof the drive links detac ed; Fig. 9 is a topplan view of the same; Fig. 10 is an edge view of Fig. 9; Fig. 11 is aright hand end view of Flg. 9; Flg. 12 is a cross section on line 12-12of Fig. 8, looking in the direction of the arrow; and, Fig. 13 is across section on line 13-18 of Fig. 9, looking in the direction of thearrow.

A broad substantial framework 1 of channel beams or the like is roviddand extends the full len h and wi th of theentire machine. At t eforward yend of this frame is revolubly mounted, in any suitable manner,a well known form of steam shovel exca.- vator or the like. Of course,when the shovel is to be operated at one side of the machine the centerof gravity of the forward end of the frame 1 and the parts of themachinery thereon, will be greatly changed and there will be a tendenctoward overhalancing of the frame an consequent overturning 'of themachine. In order to avoid this, heavy cross beams or girders 2 aresecured to the framework 1 and extend laterally across beneath theforward end of the Yframe at the Apoint where the greatest strain willbe exerted while the shovel operates at one or other of the twov sidesof the machine. These cross beams 2 are extended a considrable distanceout beyond the opposite sides of the framel, as clearly shown in Fi s. 2and 3. The whole machine is supporte on traction devices carried at theouter ends of the beams 2 at the front of the machine and equivalent tothe counter force exerted by j the operation of the shovel at the sideof the machine, under all practicable working conditions.

It follows of course that all jack screws andother side bracesl ofwhatever duirements of the case. This traction means comprises pairs ofholster beams 3 pivotally suspended from the ends of the cross beams 2.Between these bolster beams are journaled, at opposite ends, a drivewheel 4 and aguide wheel 5. The drive wheel 4 is proed with gear teethadapted to mesh with and be driven by a pinion 6 fixed to a power shaft7 which may be driven by any suitable and well known form of connectionsbetween it and the engine of the machine. Over the wheels 4 and 5 abroad traction chain 8 is passed. This chain consists of very broadlinks flexibly connected and provided on their inner faces with parallelflanges 9 which fit into sockets 10 in the drive wheel -4. Thus, as thewheel 4 is driven, the traction chain 8 will pass about the wheels 4 and'5. Due to the iexible connections, the portiony of the chain inengage-A ment with the road surface tends to yield to the contour of theroad bed and consequently the portion between the wheels 4 and 5 willnot get such firm hold on the road bed as desired, unless braced or heldrigidly against deflection. To this end the bolster beams 3 are providedwith a plurality of pressure rollers 10 which bear upon the inner faceof the lower run of the traction chain 3 and thus hold it solidly inengagement with the road surface, insuring a perfect driving grip.drawings that this particular form of trac- It will be evident onreference to the tion means provides a very extensive driving surfaceparticularly valuable for use on.,

soft yielding surfaces.

In order to prevent the entrance of gravel or dirt between the adjoininglinks vof the chain and consequent injury, guard plates or shoes 11 areprovided. These plates are suspended from the axles ofthe rollers 10, in

such position as to extend from the wheels 4 to the wheels 5 and to liein sliding contact with the inner face of the traction chain 8, theflanges 9 of the several links passing along opposite edges of the shoeor guard, and thus guiding the lower end of the chain .as it passes fromone wheel toward the other.

Thus it rwill be seen that the guard plate performs three duties,-first,it prevents entrance of gravel and other injurious subi l i l l lstances to the links of the chain; second, it

t-he chain; and, third, it acts as a brace to aid the roller 10 inlretaining the lower run of the chain in solid gripping position.

On reference to Fig. 1 it will be noticed that the drive shafts 7 aremounted to one side of the center of oscillation o f the bolster beams3. Consequently, as the beams oscillate the shafts will be rocked up anddown. In order to allow such rocking motion and at the same timemaintain the mesh of all driving gears, tlieshafts are provided with anywell known form of flexible joints near their opposite ends.

0f course, as the machine turns curves in the road the outer tractionchain will necessarily need to travel considerably faster than the innertraction chain. To this end any well known form of compensating gear maybe used between the main driving gear or pulley 12 and the coperatinggears 18 o the inner ends of the drive shafts 7.

The cross beam 2 for supporting the rear of the machine frame ispivotally connected to the center thereof, so that the rear tractiondevice may be swungabout such pivot to steer the machine. means ofsteering mechanism may be used. As shown in the drawings it comprises apulley 14 fixed to the pivot of therear cross beam 2 and adapted to berotated by means of the friction belt 15 driven from a similar pulley onthe lower end of the steering rod 16 operated by any well known form ofhand wheel 17.

It is thought that the operation and use of the invention will be clearfrom the preceding detailed description.

Many changes may be made in `the construction of the several parts ofthe machine, many rearrangements of these parts, many substitutions forthem and many other combinations of them, without in any way departingfrom the field and scope of the present invention, and it is meant toinclude all such within this application, wherein only a preferred formhas been shown and described.

Having thus fully described my invention,

frame adapted to'support the working parts of the excavator, cross beamsrigidly secured to the frame and extending laterally across the same,and traction means mounted on said cross beams.

3. An excavator support comprising, a 1

JAny well known Cir frame adapted to support the worlxilmr parts of theexcavator, cross beams rigidly secured to the frame, said beamsextending laterally across the frame and projecting beyond the` edges ofthe frame, and traction means on the ends of said cross beams.

4. An excavator support comprising, a. frame adapted to support theWorking parts of the excavator, cross beams rigidly secured to the frameand extending laterally across the same, and traction means pivotallymounted on said cross beams.

5. An excavator support comprising, a frame adapted to support theworkin parts of the excavator, cross beams rigi 1y secured to the frameand extending laterally across the same, traction means mounted on said.cross beams, and means for maintaining said traction means in operativeposition.

6. An excavator support, comprising, a frame adapted to support theWorkin parts of the excavator, cross beams rigi 1y secured to the frameand extending laterally across the same, traction means mounted on saidcross beams, and means for preventing the entrance of injurioussubstances into the traction means.

In witness whereof I have hereunto set my hand in the presence of twoWitnesses.

LOUIS ARSENE DSY. Witnesses W. S. BABoooK, C. FACOMPBEZ.

